Pressure-regulator for lamps and the like.



M. F. McGARTHY. PRESSURE REGULATOR FOR LAMPS AND THE LIKE.

APPLICATION FILED NOV. 26, 1906.

Patented May 11, 1909.

THE NORRIS PETA-ks co., WASHINGTON, 0. c4

MITCHELL F. MCCARTHY, OF CHICAGO, ILLINOIS.

PRESSURE-REGULATOR FOR LAMPS AND THE LIKE.

Specification of Letters Patent.

Patented May 11, 1909.

Application filed November 26, 1906. Serial No. 345,234.

To all whom it may concern:

Be it known that I, MITCHELL F. MCCAR- 'ri-ir, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pressure-Regulators for Lamps and the Like, of which the following is a specification.

My invention aims to provide an improved and simple means for regulating the pressure and amount of combustible gas delivered to a lamp burner or the like, and maintain tiie same constant although the pressure in the supply or pipe may vary within comparatively wide limits.

I propose to actuate a controlling or pressure-reducing valve by means of a diaphram upon which the regulated pressure of the gas cts, opening the same more when the pressure diminishes and closing it more or less as the pressure rises. In order to conduct the gas directly to the burner and in as straight a path as is convenient, I allow the same to pass through an aperture in the diaphragm, a desirable construction employing a tube extending through the diaphragm. This is an extremely simple structure and is found to work efficiently and satisfactorily. In addition to the gas pressure I use two springs acting on the diaphragm, one, the compression spring, acting in opposition to the gas pressure, while the other, the compensating spring, acts in conjunction with the pressure exerted by the gas.

Various other features of my invention will become apparent to those skilled in the art as the following description of the invention is read in connection with the accompanying drawings forming a part of this specification.

Figure 1 on said drawing is a perspective view of a gas burner equipped with one embodiment of my pressure regulator; and Fig. 2 is a longitudinal section of the structure shown in Fig. 1.

On the end of a gas supply pipe 10, by means of a screw-threaded or other suitable connection, I mount a diaphragm clamping member 11 which acts also as a conduit and provides a passage for the gas. Within this circular member 11 is a partition 12 having a central conical valve port or opening 13, the partition being in reality an inwardly projecting round ledge or shelf. The upper part of member 11 is flared out and is of much greater diameter than the lower portion. The circular upwardly-projecting marginal flange 14 on the top of the diaphragm clamping member 11 is screw threaded on its outer surface to engage the internal threads of a round depending flange 16 on a similarly flared diaphragm clamp 15. Between these two clamps 11 and the periphery of a circular diaphragm is adapted to be grasped and securely held; This diaphragm includes a round leather or kid disk 17, preferably enameled on one side or otherwise rendered impervious to the passage of gas therethrough. Any other flexible material through which gas cannot pass may be employed in place of the leather mentioned. In order to stiffen this leather diaphragm I use on one side of it a thin metal disk or round sheet 18 of smaller diameter than the leather diaphragm 17 so that its outer edge is not gripped between members 11 and 15.

The burner tip 19 is inserted in the top or upper end of a burner 20 which, at its lower end, is secured to the top of a gas conducting tube 21, which in turn is soldered at its lower end within a hollow diaphragm fastener 22 which in effect forms a continuation of or part of the tube. Fastener 22 has a flat seat or enlargement 22 adapted to bear against the under side of disk 17 and an adjacent screw threaded part 23 adapted to extend upwardly through and beyond central apertures in the leather and metal disks. Above these disks is a nut 24 engaging the threads of fastener 22 and is employed to firmly clamp or grip the leather and metal parts of the diaphragm between itself and the flat seat 22 thereby securely fastening the tube to the diaphragm. Beneath the diaphragm the fastener 22 has number of radial holes 25 communicating with its longitudinal cen tral aperture, and screwed into the lower end of the member 22 is a valve stem 26 carrying at its lower end a conical valve 27 adapted to open and close the port opening 13. A compression sprin 28 is interposed between the diaphragm clamping nut 24 and an adjustable nut 29 recessed on its interior to receive the top portion of the spring and screw threaded on its exterior to engage the internal threads 30 at the upper end of dia V hragm clamping member 15. Also mountec on the top of member 15 is a cylindrical burner guide and support 31 cut away on two sides at 32 to permit access to the knurled end 33 of the spring-adjusting nut 29. Between the ledge or circular shoulder 12 of the member 11 and the diaphragm fastening 22 I provide a compensating spring 34 which acts upon i the diaphragm in opposition to spring 28 and i tener 22 which, as stated. above, in reality r forms a part or continuation of the tube 21, and through the latter to the burner 20 and tip 19 where the combustion takes place. If the pressure rises above that for which the regulator is adjusted it presses upon the diaphragm 17 lifting the same and the attached valve 27 so that the port opening 13 is somewhat closed thereby reducing the pressure of the gas delivered to the burner. if, on the other hand, the gas pressure decreases spring 18 overcomes the combined pressures of the gas and compensating spring 34 and causes I the diaphragm to descend, thereby opening the valve port wider and admitting more gas to the burner or tip. It should be understood that the spring 34 is weaker than the compression spring 28 and is employed in order that the device may be sensitive under low pressures. Particular attention is directed to the fact that the gas is delivered to 1 a burner or the mixing chamber of a mantle lamp or the Bunsen form or burner where the air is admitted through an aperture of the diaphragm, in fact through a tube extending through the diaphragm. It will be noticed that because of this construction the gas has a comparatively direct path from the supply pipe 10 to the burner 20.

To those well acquainted with this art it will i closing the passage through said conduit and actedv upon by the pressure oi said fluid, a valve connected to and movable'wit'h said diaphragm and adapted to control the passage of said fluid througl'r said valve port, a compensating spring interp sed between said diaphragm and said shoulder or ledge, a rigid tube to conduct said fluid to the burner, said tube extending through said diaphragm and communicating with said conduit between said diaphragm and said valve and valve port, a compression spring pressing against said diapl'n'agm in opposition to the action of said compensating spring, said compression spring surrounding said tube, and a screw threaded nut encircling said tube and. adapted to adjust the pressure of said compression spring on said diaphragm, substantially described.

MIIOHELL F. rWlcOARlH'l'.

Witnesses Y. Z. ZELAYA, JOHN J. OBRIEN. 

